Direct/Indirect media switching VoIP calls

When direct switching is enabled, the use of DSP resources is not required for connections between IP devices.

When indirect switching is enabled, connections between IP and non-IP endpoints are made via an IP media gateway. This is carried out by the integrated standard media switch that switches VoIP channels for call connections in the IP network. The Standard Media Switch uses DSP resources for the real-time processing of the call data. VoIP channels are always required between IP and non-IP endpoints; for example, for internal connections between a SIP/IP phone and a digital system phone or an external user routed to the internal Voice Mail System via an SIP network interface. If indirect switching is enabled for SIP Devices/SIP Trunk, media will always be routed over PBX, using 2 DSP Channels, even when direct switching is possible.

For more information, see MiVoice Office 400 documentation.